Danfoss VLT AutomationDrive FC 360 Programming Guide

Option Name Description
[0] Coast Leaves the motor in free mode.
[1] DC hold/Motor Preheat Energizes the motor with a DC hold
current (see parameter 2-00 DC Hold/
Motor Preheat Current).
[3] Pre-magnetizing Builds up a magnetic field while the
motor is stopped. This allows the motor
to produce torque quickly at commands
(asynchronous motors only). This
premagnetizing function does not help
the first start command. Two different
solutions are available to premagnetize
the machine for the first start command:
Solution 1:
1 Start the drive with a 0 RPM reference.
2 Wait 2 to 4 rotor time constants (see the
formula below) before increasing the
speed reference.
Solution 2:
1 Set parameter 1-71 Start Delay to the
premagnetize time (2–4 rotor time
constants).
2 Set parameter 1-72 Start Function to [0]
DC hold.
3 Set the DC-hold current magnitude
(parameter 2-00 DC Hold/Motor Preheat
Current to be equal to I
pre-mag
=U
nom
/
(1.73 x Xh)).
Sample rotor time constants=(Xh+X2)/
(6.3*Freq_nom*Rr)
1 kW=0.2 s
10 kW=0.5 s
100 kW=1.7 s
1-82 Min Speed for Function at Stop [Hz]
Default value: 0.0 Hz Parameter type: Range (0.0–500.0 Hz)
Setup: All setups Conversion index: -1
Data type: Uint16 Change during operation: True
Set the output frequency at which to activate parameter 1-80 Function at Stop.
1-88 AC Brake Gain
Default value: 1.4 Parameter type: Range (1.0–2.0)
Setup: All setups Conversion index: -1
74 | Danfoss A/S © 2024.01 AU275649936274en-001401 / 130R0507
Programming Guide | VLT® AutomationDrive FC 360

Danfoss VLT AutomationDrive FC 360 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 360
Category	DC Drives
Language	English